Forum Post: Estimation of worst-case power consumption for MSP430F523x

Hi.

I have questions on the worst-case power consumption of MSP430F5237: both high-frequency & low-frequency mode. 

Question 1: (high-frequency mode) 

According to “SLAS897 –SEP. 2013”, “page 1/104” shows 290 uA/MHz at 8 MHz in active mode while the flash is being programmed.

Then, is the maximum power consumption 3.6V x 290 uA /MHz * 8 MHz = 8.352 mW?

From this calculation, can I assume that the maximum power consumption of the uC is ~8.35 mW?

Or do I need to consider other sources of power consumption?

Question 2:  (low-frequency mode) 

For my application, I used a quartz crystal at pin 12 (XIN) and 13 (XOUT) to provide an external clock of 32.768kHz.

I want to estimate the maximum power-consumption in worst-case. 

The table on page 52/104 of above document shows the power consumption with the following test condition: “fOSC = 32768 Hz, XTS = 0, XT1BYPASS = 0, XT1DRIVEx = 3, TA = 25°C”.

With this condition, the power consumption will be 3.0V x 0.290 uA = 0.9uW.

Then, can I assume that the power consumption of the uC is less than 1 uW?

Or do I need to consider other sources of power consumption in the uC?

Thank you.